Some Freeverse I was working on today.

I did this one to DJ Premier's "Boom" Instrumental.

http://www.youtube.com/watch?v=CiQ-DNpsZ18

I convert my thoughts with the tip of a pen./
Spit it again, but every time my mission extends./
Bars miss the target with precision attempts./
I aim hard like a marksmen, but end with instant regret./
But I advance, and I endure the storm./
Understand that it takes time perfecting my form./
So it's pen to the pad, making my flow fluid,/
cause if it was easy then every one would do it./

Criticism would be appreciated and stuff I can improve on. I'm wondering though why I still don't write full 16's.